脑梗死后癫痫的定量脑电图特点

摘要

目的 探讨脑梗死后癫痫患者定量脑电图(QEEG)的特点.方法 将67例脑梗死后初次癫痫患者作为观察组,选择同期健康体检者74例作为对照组,入选者采用上海诺诚电气有限公司生产的型号为Z2N-F-32W脑电图仪进行QEEG功率谱分析,δ(0.8～3.9 Hz)、θ(4.0～7.7 Hz)、a(7.8～12.9 Hz)和β(13.0～20.0 Hz),计算出各个频带的绝对功率值及(δ+θ)/(α+β)值,并作为观察评估指标进行比较.结果 观察组脑梗死病灶大小与(δ+θ)/(α+β)值无相关性(P＞0.05);观察组左额区(3.15±2.63vs1.97±1.42,P=0.002)、右额区(3.17±2.53 vs1.88±1.46,P=0.000)、左中央(2.69±2.59 vs 1.65±1.28,P=o.004)、左顶区(2.58±2.45 vs 1.28±1.10,P=0.000)、右顶区(2.69±2.81 vs 1.21±1.06,P=0.000)、左枕区(P=0.000)、右枕区(P=0.000)、左颞区(P=0.000)以及右颞区(P=0.002)的(δ+θ)/(α+β)值显著高于对照组,而在右中央的(δ+θ)/(α+β)值与对照组比较无统计学差异(P＞0.05).脑梗死后早发性癫痫患者与迟发性癫痫患者的(δ+θ)/(α+β)值无统计学差异(P＞0.05).结论 QEEG对脑梗死后癫痫的诊断、脑梗死后患者异常脑电活动评价有重要价值.%Objective To study the characteristics of quantitative EEG in epilepsy patients after ischemic stroke.Methods Sixty-seven first-ever epilepsy patients after ischemic stroke served as an observation group and 74 age-matched healthy persons served as a control group in this study.The quantitative EEG power spectra of two groups,including δ (0.8-3.9 Hz),θ (4.0-7.7 Hz),α (7.8-12.9 Hz) and β (13.0-20.0 Hz),were analyzed using the Z2N-F32w EEG device made in Shanghai.The (δ+θ)/(α+β) power value on different regions of brain between the two groups was computerized and used as an observation index.Results The ischemic stroke size was not related with the (δ+θ)/(α+β) power value in observation group (P＞0.05).The (δ+θ)/(α+β)power value on the left frontal area (3.15±2.63 vs 1.97±1.42,P=0.002),right frontal area (3.17±2.53 vs 1.88±1.46,P=0.000),left central area (2.69±2.59 vs 1.65±1.28,P=0.004),left parietal area (2.58±2.45 vs 1.28±1.10,P=0.000),right parietal area (2.69±2.81 vs 1.21± 1.06,P=0.000),left occipital area,right occipital area,left temporal area and right temporal area was significantly higher in observation group than in control group (P＜0.01).No significant difference was found in (δ+θ)/(α+β) power value on the right central lobe and left occipital lobe between the two groups and between early and late onset epilepsy patients after ischemic stroke (P＞0.05).Conclusion Quantitative EEG plays an important role both in diagnosis of epilepsy and in assessment of abnormal brain electrical activity in epilepsy patients after ischemic stroke.